TM 55-1510-222-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
G. AVIONICS FLIGHT CHECKS (CONT)
i. Retune to a low frequency
station of known location.
j. Mode selector switch - ADF.
The
RMI azimuth
card
should coincide with the air-
craft magnetic heading and
the bearing pointer should in-
dicate the correct magnetic
bearing to station.
k. Distance range (ADF) - Check
as follows:
(1) Mode selector switch -
ADF.
(2) Tune control - Tune sta-
tions to determine operat-
ing
range
of direction
tinder. End of effective
operating range may be
considered to be reached
when the RMI bearing
needle fails to return to
within three degrees of
starting
bearing
when
loop is slewed first clock-
wise and then counter-
clockwise.
*9.
Marker beacon/glideslope receiver
K13-18
- Check as follows:
a. Marker beacon volume con-
trol (pedestal extension) - Ro-
tate rotate full clockwise.
b. NAV A control (pilot’s audio
control panel) - Push on and
turn clockwise to adjust vol-
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